Low-loss high-voltage ceramic capacitor dielectric

Abstract

The invention relates to the technical field of inorganic nonmetallic materials, in particular to a low-loss high-voltage ceramic capacitor dielectric. By adopting a conventional ceramic capacitor dielectric preparation method and using common chemical raw materials for capacitor ceramic, a lead-free and cadmium-free low-loss high-voltage ceramic capacitor dielectric is prepared and the sintering temperature of the capacitor ceramic can be reduced. The dielectric is suitable for preparing monolithic ceramic capacitors or chip multi-layer ceramic capacitors, the cost of the ceramic capacitors can be greatly reduced, the withstand voltage can be improved and the losses can be reduced to expand the application scope of the ceramic capacitors, the safety of the ceramic capacitors can be greatly improved and the environment is not polluted during preparation and use at the same time.

Description

technical field [0001] The invention relates to the technical field of inorganic non-metallic materials, in particular to a low-loss high-voltage ceramic capacitor medium; it adopts a conventional ceramic capacitor medium preparation method and utilizes common chemical raw materials of capacitor ceramics to prepare lead-free and cadmium-free low-loss high-voltage ceramics Capacitor medium can also reduce the sintering temperature of capacitor ceramics. This medium is suitable for preparing monolithic ceramic capacitors and multilayer ceramic capacitors, which can greatly reduce the cost of ceramic capacitors, and at the same time can increase withstand voltage and reduce losses to expand ceramic capacitors. The application range, and can greatly improve the safety of ceramic capacitors, while not polluting the environment in the process of preparation and use. Background technique [0002] Color TV, computer, communication, aerospace, missile, navigation and other fields urg...

AI Technical Summary

Problems solved by technology

[0011] There is also a Chinese patent "a medium-low temperature sintered high-voltage ceramic capacitor dielectric" (patent application number: 200410041863.x), which uses a unique formula (weight percentage) (BaTiO 3 60-90%, SrTiO 3 1-20%CaZrO 3 0.1-10%, Nb 2 o 5 0.01-1%, MgO0.01-1%, CeO 2 0.01-0.8%, ZnO0.01-0.6%, Co 2 o 3 0.03-1%, bismuth-lithium solid solution 0.05-10%) to obtain a capacitor ceramic that meets the following properties after medium-temperature sintering: the dielectric constant is 2000-3000, the withstand voltage is above 6kV / mm, and the additive to reduce the sintering temperature is bismuth-lithium solid solution , the dielectric loss of the patent is too high

Images